Blast furnace slag discharge trench with built-in water cooling system

Abstract

The invention relates to a blast furnace slag discharge trench with a built-in water cooling system, which is basically composed of a cast steel slag trench body, a water inlet pipe, a water outlet pipe, a stainless steel corrugated pipe and a valve, wherein a cooling water pipe is formed by bending a seamless steel pipe; the cast steel slag trench is provided with a water inlet end and a water outlet end which are respectively connected with the water inlet pipe and the water outlet pipe; and the stainless steel corrugated pipe, valve and water inlet and outlet pipes constitute a loop. Finally, the whole slag trench is divided into a plurality of units which are connected in parallel. The valve can be utilized to implement independent opening or closing, maintenance and replacement of a certain unit. In the slag discharge trench system, heat in the slag in the slag trench is taken away by the circulating water flow in the cooling water pipe, so that the slag is solidified on the cooler surface to form a slag shell; since the heat-conducting property of the slag is low, the slag on the cooler surface is always unfused under the action of cooling water, thereby protecting the cast steel cooler; and under such conditions, the slag becomes a working lining like a refractory material.

Description

technical field [0001] The invention relates to a blast furnace slag discharge ditch with an embedded water cooling system used in the technical field of blast furnace ironmaking. Background technique [0002] The blast furnace slag ditch is an important device in the blast furnace tapping platform. It is generally made of refractory materials. Its main role in the blast furnace ironmaking is to use the silicon oxide slag after the separation of slag and iron in the big ditch in front of the blast furnace. (hereinafter referred to as: slag) is flowing and transported, and the slag is transported from the big ditch to the slag flushing ditch, the dry slag ditch and the dry slag tank. However, due to the complex mineral composition in the slag, its main component is silica, and it also contains a variety of Metal and non-metal oxides, etc., so general refractory castables are not very good at resisting slag erosion, and it is difficult to achieve good results simply by improvi...

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Problems solved by technology

[0002] The blast furnace slag ditch is an important device in the blast furnace tapping platform. It is generally made of refractory materials. Its main role in the blast furnace ironmaking is to use the silicon oxide slag after the separation of slag and iron in the big ditch in front of the blast furnace. (hereinafter referred to as: slag) is flowing and transported, and the slag is transported from the big ditch to the slag flushing ditch, the dry slag ditch and the dry slag tank. However, due to the complex mineral composition in the slag, its main component is silica, and it also contains a variety of Metal and non-metal oxides, etc., so general refractory castables are not very good at resisting slag erosion, and it is difficult to achieve good results simply by improving the grade of refractory materials or changing the composition of refractory materials

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